I have not as yet found Christopher on either the 1851 or 1871 census records, but have found the following
1881 3 Kay's Folly Osmotherley
Christopher Natrass Head Mar 55 Iron Stone Miner Yorkshire, Osmotherley
Annie Natrass Wife Mar 28 Yorkshire, Harsley
John Natrass Son 2 Yorkshire, Osmotherley
1891 East Side three rooms occupied Osmotherley
Christopher Nattrass Head Mar 56 Agricultural Lab Yorkshire, Elleerbeck
Ann Nattrass Wife Mar 38 Yorkshire, East Harsley
John Nattrass Son 13 Scholar Yorkshire, Osmotherley
David Nattrass Son 8 Yorkshire, Osmotherley
Elizabeth Nattrass Daug 6 Yorkshire, Osmotherley
Ann Nattrass Daug 3 Yorkshire, Osmotherley
Martha Nattrass Daug 2 (either weeks or months) Yorkshire, Osmotherley
also further down same page
East Side Osmotherley
Thomas Wright Head Single 64 Farmer Yorkshire, Osmotherley
Hannah Nattrass Sister Widow 57 Living on own means Yorks, Osmotherley
Elizabeth Nattrass Niece Single 27 Dressmaker Yorkshire, Osmotherley
John Nattrass Nephew Single 22 Labourer Yorkshire, Osmotherley
I will look for 1901 next
CJL